Site monitoring startup Chartbeat announced a $15.5 million raise today from investors Harmony Partners, DFJ, Index Ventures, Jason Calacanis, and others.

The company says it raised these funds on a lofty goal: “We want to make sure that 10 years from now, it’s possible to build a sustainable business around quality content.” This mission arrives as classic editorial models — ones led by ad dollars and intuition — wobble online and across the social Web.*

In addition to the new funding, Chartbeat is raising the curtain on two new products, one for content creators and another for advertisers. Specifically, they’re releasing a headline optimization tool and an ad serving tool, both of which apparently consider user behavior (not just clicks).

 

*My apologies for the buzzphrase.